Nuclear power station slender pipe recovery processing device

Abstract

The invention discloses a nuclear power station slender pipe recovery processing device which comprises a moving main body, a mounting frame, at least one shearing shrinkage device and temporary storage containers corresponding to the shearing shrinkage devices in number, the mounting frame is slidably connected with the moving main body, and the shearing shrinkage devices are arranged on the lower portion of the moving main body and connected with the mounting frame. At least one temporary storage container is connected with a shearing and volume reducing device; the movable main body and / or the mounting frame drive the shearing and volume-reducing device to directionally move to the position of the slender pipe, and the slender pipe is pulled out and sheared off by the shearing and volume-reducing device and then is put into the temporary storage container. The slender pipe is cut off and segmented through the shearing and volume reducing device to reduce the overall length of a single slender pipe, the slender pipe is collected through the temporary storage container, the slender pipe needing to be replaced during overhaul of a nuclear power plant can be effectively treated in batches, and the overhaul efficiency of the nuclear power plant is improved.

Description

Technical Field

[0001] This invention relates to the field of radioactive material recovery and treatment technology in nuclear power plants, and more particularly to a slender tube recovery and treatment device for nuclear power plants. Background Technology

[0002] The detector assembly of the core measurement system is used to measure neutron flux, temperature, and water level during nuclear reactor operation. During operation, the detector assembly is directly inserted into the nuclear fuel in the core. Due to the radioactive environment of the nuclear fuel, the detector assembly itself becomes activated, resulting in a very high radioactive dose rate when the detector assembly is removed.

[0003] In some nuclear reactor addition-type reactors, the core measurement detector assemblies are inserted from the top of the reactor. These assemblies penetrate from outside the reactor top cover into the nuclear fuel assemblies. Each assembly is several meters long and consists of dozens of units, measuring different areas. During operation, the core condition is monitored online in real time. The detector assemblies have a limited lifespan and require complete replacement every two refueling cycles, or every three years. During major nuclear power plant overhauls, the entire batch of detector assemblies is replaced. Given the high radioactive dose rate of these assemblies, the assembly removal and handling procedures must fully consider dose rate control during operation.

[0004] The detector assembly is long but only a few millimeters in diameter, making it difficult to store directly. Currently, there is no dedicated equipment on the market for handling it. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device for recycling and processing slender tubes from nuclear power plants.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a nuclear power plant slender tube recycling and processing device, including a mobile body, a mounting frame, at least one shearing and shrinking device and a temporary storage container corresponding to the number of shearing and shrinking devices, the mounting frame being slidably connected to the mobile body, the shearing and shrinking device being disposed at the lower part of the mobile body and connected to the mounting frame, and at least one of the temporary storage containers being connected to one of the shearing and shrinking devices.

[0007] The moving body and / or the mounting frame drive the shearing and shrinking device to move directionally to the location of the slender tube. The shearing and shrinking device pulls out the slender tube, cuts it, and puts it into the temporary storage container.

[0008] In some embodiments, the shearing and shrinking device includes a driving device, a first sliding member, a second sliding member, a pulling device for pulling out the slender tube, a shearing device for cutting the slender tube, and a shielding body for shielding radiation from the slender tube. The driving device and the first sliding member are respectively connected to the mounting bracket, and the extension shaft of the driving device is connected to the second sliding member. The shielding body is connected to the second sliding member, and the pulling device and the shearing device are respectively connected to the shielding body with their working ends extending into the interior of the shielding body.

[0009] The temporary storage container is located at the bottom of the shield and is detachably connected to the shield via a connecting structure to accommodate the cut-off segments of the slender tube.

[0010] In some embodiments, the extraction device includes a lead screw drive assembly, a second drive motor, an extraction chuck, a hydraulic device, a pressure sensor, and a control motor. The second drive motor is fixedly mounted on the top of the shield, and its extension shaft is connected to the lead screw drive assembly to control the lifting and lowering of the lead screw drive assembly. The lead screw drive assembly is hinged to the hydraulic device and drives the hydraulic device to swing through the control motor. The hydraulic device is connected to the extraction chuck to drive the extraction chuck to clamp or release. The pressure sensor is located on the top of the shield and connected to the lead screw drive assembly to monitor the required extraction force.

[0011] In some embodiments, the shearing device includes a third drive motor, a rotating shaft, a hydraulic system, and a shearing head. The third drive motor is fixedly installed on the top of the shield, and the extension shaft of the third drive motor is connected to the rotating shaft to drive the rotating shaft to rotate. The hydraulic system is fixedly installed on the shield and extends through the shield into the interior of the shield to connect with the shearing head to drive the shearing head to move.

[0012] In some embodiments, the moving body includes at least two drive modules, a main beam, and an auxiliary support frame. The two drive modules are respectively connected to both ends of the main beam to drive the main beam to move. The auxiliary support frame is opened in the length direction of the main beam and is slidably connected to the mounting frame.

[0013] In some embodiments, the drive module includes a first drive motor, a drive wheel, and a driven wheel, wherein the extended shaft of the first drive motor is connected to the drive wheel, and the driven wheel is connected to the drive wheel via a connecting shaft.

[0014] In some embodiments, the mobile body further includes a walking staircase connected to the main beam.

[0015] In some embodiments, the auxiliary support frame includes support beams disposed on both sides of the main beam in the width direction and a rack disposed on either side of the main beam in the width direction;

[0016] The mounting bracket includes a connecting seat, a gear assembly, a main mounting seat, and a rotating module. The gear assembly is fixedly mounted on the connecting seat, the connecting seat is slidably connected to the support beam, and is meshed with the rack through the gear assembly; the main mounting seat is rotatably connected to the connecting seat through the rotating module.

[0017] In some embodiments, the gear assembly includes a transmission gear and a fourth drive motor, the fourth drive motor being fixedly mounted on the main mounting base, and the drive shaft of the fourth drive motor being connected to the transmission gear.

[0018] In some embodiments, the system further includes a cantilever crane and a rotating base, wherein the cantilever crane is rotatably connected to the mobile body via the rotating base.

[0019] By implementing this invention, the following beneficial effects are achieved:

[0020] The present invention relates to a nuclear power plant slender tube recovery and processing device, comprising a mobile main body, a mounting frame, at least one shearing and volume-reducing device, and temporary storage containers corresponding to the number of shearing and volume-reducing devices. The mounting frame is slidably connected to the mobile main body. The shearing and volume-reducing devices are located at the lower part of the mobile main body and connected to the mounting frame. At least one temporary storage container is connected to one shearing and volume-reducing device. The mobile main body and / or the mounting frame drive the shearing and volume-reducing devices to move directionally to the location of the slender tube. The shearing and volume-reducing devices pull out the slender tube, cut it, and place it into the temporary storage container. By using the mobile main body and / or the mounting frame to drive the shearing and volume-reducing devices to move directionally to the location of the slender tube, and by using the shearing and volume-reducing devices to cut the slender tube into segments to reduce the overall length of each segment, and by collecting the slender tubes through the temporary storage containers, the device can effectively process batches of slender tubes that need to be replaced during nuclear power plant overhauls, thereby improving the efficiency of nuclear power plant overhauls. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of a nuclear power plant slender tube recycling and processing device according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the moving main body in the diagram;

[0024] Figure 3 yes Figure 2 A schematic diagram of the mounting bracket in the diagram;

[0025] Figure 4 yes Figure 2 A schematic diagram of the installation structure of the mounting bracket and auxiliary support bracket;

[0026] Figure 5 yes Figure 1 A schematic diagram of the shearing and volume reduction device in the diagram;

[0027] Figure 6 yes Figure 5 A perspective view of the shearing and shrinking device in the middle;

[0028] Figure 7 yes Figure 5 A schematic diagram of the drive device, the first slider, and the second slider in the diagram;

[0029] Figure 8 yes Figure 5 A schematic diagram of the extraction device in the middle;

[0030] Figure 9 yes Figure 5 A schematic diagram of the shearing device in the diagram;

[0031] Figure 10 yes Figure 1 A schematic diagram of the installation structure of the temporary storage container;

[0032] Figure 11 yes Figure 1 A schematic diagram of the installation structure of a slender tube recycling and processing device in a nuclear power plant. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] See Figures 1 to 11 One embodiment of the present invention discloses a nuclear power plant slender tube recovery and processing device. Slender tubes are a general term for objects with small diameters and long lengths. For example, a slender tube can be a detector assembly, approximately 12 meters long and approximately 7.5 mm in diameter. The detector assembly extends from outside the reactor top cover into the nuclear fuel assembly; there are dozens of such assemblies in a reactor, evenly distributed within the fuel assembly. The specific structure of the nuclear power plant slender tube recovery and processing device of the present invention will be described below, using the detector assembly as the object of application.

[0037] like Figure 1 As shown, the nuclear power plant slender tube recovery and processing device of the present invention includes a mobile body 1, a mounting frame 2, at least one shearing and shrinking device 3, and a temporary storage container 4 corresponding to the number of shearing and shrinking devices 3. The mounting frame 2 is slidably connected to the mobile body 1. The shearing and shrinking device 3 is located at the lower part of the mobile body 1 and connected to the mounting frame 2. At least one temporary storage container 4 is connected to one shearing and shrinking device 3. The mobile body 1 and / or the mounting frame 2 drive the shearing and shrinking device 3 to move directionally to the location of the slender tube. The shearing and shrinking device 3 pulls out the slender tube, cuts it, and puts it into the temporary storage container 4. Specifically, the mobile body 1 can drive the mounting frame 2 and the shearing and shrinking device 3 to move directionally to the location of the slender tube. In this case, the slender tube is exactly on the moving path of the mobile body 1, and the shearing and shrinking device 3 moves into place in one step. If the slender tube is not on the moving path of the mobile body 1, the mounting frame 2 can move along the mobile body 1 to move the shearing and shrinking device 3 to the location of the slender tube before proceeding to the next step.

[0038] The moving body 1 is used to enable the forward and backward movement of the entire nuclear power plant's slender tube recovery and processing unit, and to bear the weight of the slender tubes being sheared. The mounting frame 2 is mounted on the moving body 1 and can move along it, driving the overall movement of the shearing and shrinking device 3 and the temporary storage container 4. The movement of both the moving body 1 and the mounting frame 2 allows for precise positioning of the slender tubes by the shearing and shrinking device 3 and the temporary storage container 4. The shearing and shrinking device 3 cuts the slender tubes and places the cut tubes into the temporary storage container 4. The temporary storage container 4 collects the cut tubes and serves as a transfer container.

[0039] like Figure 2 As shown, in some embodiments, the moving body 1 includes at least two drive modules 11, a main beam 12, an auxiliary support frame 13, and a walking staircase 14. The two drive modules 11 are respectively connected to both ends of the main beam 12 to drive the main beam 12 to move. The auxiliary support frame 13 is formed along the length of the main beam 12 and is slidably connected to the mounting frame 2. The walking staircase 14 is connected to the main beam 12.

[0040] The drive module 11 is used to realize the movement function, driving the main beam 12 to move in a specific direction, such as realizing the back-and-forth movement of the entire nuclear power plant's slender tube recycling and processing unit. The auxiliary support frame 13 can be welded to the side wall of the main beam 12 for the installation of the mounting frame 2 and for the movement of the mounting frame 2 in the left and right directions. The walking staircase 14 is used for personnel to walk, serving as a passage connecting the main beam 12 and the ground. The upper end of the walking staircase 14 is flush with the top of the main beam 12, and the lower end is slightly higher than the bottom of the drive module 11, with the bottom fixedly connected to the drive module 11.

[0041] In some embodiments, the drive module 11 includes a first drive motor 111, a drive wheel 112, and a driven wheel 113. The extended shaft of the first drive motor 111 is connected to the drive wheel 112, and the driven wheel 113 is connected to the drive wheel 112 via a connecting shaft. To facilitate the installation of the first drive motor 111, the drive wheel 112, and the driven wheel 113, the drive module 11 also includes a mounting box with an open bottom. The first drive motor 111 is fixedly installed inside the mounting box and is directly or indirectly connected to the drive wheel 112 via an intermediate connector. The drive wheel 112 and the driven wheel 113 are rotatably connected to the mounting box. The mounting box has a certain load-bearing capacity and can be used to support the main beam 12 and the walking stairs 14. The first drive motor 111, the drive wheel 112, and the driven wheel 113 are not shown in the figure.

[0042] like Figure 3 and Figure 2 As shown, in some embodiments, the auxiliary support frame 13 includes support beams 131 disposed on both sides of the main beam 12 in the width direction and a rack 132 disposed on either side of the main beam 12 in the width direction. The mounting frame 2 includes a connecting seat 21, a gear assembly 22, a main mounting seat 23, and a rotating module 24. The gear assembly 22 is fixedly mounted on the connecting seat 21, and the connecting seat 21 is slidably connected to the support beam 131 and is meshed with the rack 132 through the gear assembly 22. The main mounting seat 23 is rotatably connected to the connecting seat 21 through the rotating module 24.

[0043] Support beam 131 supports mounting frame 2 and provides a moving path for mounting frame 2. Gear assembly 22 cooperates with rack 132 to achieve movement, thereby driving the entire mounting frame 2 to move. Connecting seat 21 is used to slide and connect the moving body 1, providing load-bearing capacity. Main mounting seat 23 provides a mounting base for shearing and shrinking device 3. Rotating module 24 enables rotational connection between mounting seat and connecting seat 21. Rotating module 24 may include a motor and a rotating block. The motor is mounted on connecting seat 21, and the rotating block is connected to main mounting seat 23. The drive shaft of the motor is connected to the rotating block, and the motor drives the rotating block to rotate. The rotating block can rotate 360°, thereby driving the main mounting seat 23 to rotate. Main mounting seat 23 is used for the installation and support of shearing and shrinking device 3 and temporary storage container 4, etc. Main mounting seat 23 may have at least one mounting position for installation of shearing and shrinking device 3.

[0044] To improve operational efficiency, there can be two or more shearing and shrinking devices 3. Correspondingly, the main mounting base 23 has two or more mounting positions, improving overall operational efficiency. The shearing and shrinking devices 3 are symmetrically arranged on the main mounting base 23, ensuring force balance and preventing the main mounting base 23 from tilting due to uneven force, while also facilitating symmetrical shearing.

[0045] like Figure 4 As shown, in some embodiments, the gear assembly 22 includes a transmission gear 221 and a fourth drive motor 222. The fourth drive motor 222 is fixedly mounted on the main mounting base 23, and its drive shaft is connected to the transmission gear 221. The fourth drive motor 222 drives the transmission gear 221 to rotate, and the transmission gear 221 meshes with the rack 132, enabling the transmission gear 221 to move along the length of the rack 132, thereby driving the overall mounting frame 2 to move along the length of the main beam 12. The drive module 11 drives the main beam 12 to move in a specific direction, realizing the forward and backward movement of the entire nuclear power plant slender tube recovery and processing device. The movement of the mounting frame 2 along the length of the main beam 12 enables the left and right movement of the shearing and shrinking device 3 and the temporary storage container 4, allowing the shearing and shrinking device 3 to be precisely moved above the slender tube for subsequent operations. In this invention, forward and backward and left and right are based on... Figure 1 The directions shown are not intended as directional restrictions for practical application.

[0046] like Figures 5 to 7As shown, in some embodiments, the shearing and shrinking device 3 includes a driving device 31, a first sliding member 32, a second sliding member 33, a pulling device 34 for pulling out the slender tube, a shearing device 35 for cutting the slender tube, and a shielding body 36 for shielding radiation from the slender tube. The driving device 31 and the first sliding member 32 are respectively connected to the mounting bracket 2, and the extension shaft of the driving device 31 is connected to the second sliding member 33. The shielding body 36 is connected to the second sliding member 33, and the pulling device 34 and the shearing device 35 are respectively connected to the shielding body 36, with their working ends extending into the interior of the shielding body 36. A temporary storage container 4 is located at the bottom of the shielding body 36 and is detachably connected to the shielding body 36 via a connecting structure to accommodate the cut slender tube segment.

[0047] The drive device 31 has an axial drive function, used to drive the first sliding member 32 to move axially along the drive shaft of the drive device 31, thereby realizing the radial movement of the shield 36. The shield 36 then drives the pulling device 34 and the shearing device 35 to achieve fine-tuning of their positions. The drive device 31 can be a linear motor, a cylinder, a hydraulic cylinder, an electric push rod, or a lead screw drive.

[0048] The first sliding member 32 provides a moving path for the second sliding member 33 and can be a guide rail or guide groove. The second sliding member 33 slides along the first sliding member 32, simultaneously moving the shield 36 closer to or away from the mounting bracket 2. There are two first sliding members 32 and two second sliding members 33, balancing the forces and facilitating sliding. To achieve synchronous movement of the two second sliding members 33, they can be connected to the drive device 31 via the same connecting component 331.

[0049] The extraction device 34 is used to extract the slender tube, i.e., to lift or lower the slender tube, and to transfer the slender tube, i.e. to move the slender tube into the temporary storage container 4. The extraction device 34 is partially fixed to the shield 36 and moves with the shield 36.

[0050] The shearing device 35 is used to cut the slender tube, so that the slender tube is cut into two, three, four, etc. Each cut slender tube meets the length that the temporary storage container 4 can accommodate, and the lengths of the two or more cut ends are the same or different.

[0051] The shielding body 36 is used for dose shielding of the detector assembly that extracts water, and is made of shielding material. The shielding body 36 can be an inverted barrel-shaped structure with an open bottom and a closed top. A positioning mounting pin 37 is provided on the top of the shielding body 36 for positioning and installing the temporary storage container 4. The extraction device 34 and the shearing device 35 respectively penetrate through the shielding body 36 and extend partially into the interior of the shielding body 36 to complete the shearing operation of the slender tube inside the shielding body 36.

[0052] like Figure 5 , Figure 6 and Figure 8As shown, in some embodiments, the extraction device 34 includes a lead screw drive assembly 341, a second drive motor 342, an extraction chuck 343, a hydraulic device 344, a pressure sensor 345, and a control motor. The second drive motor 342 is fixedly mounted on the top of the shield 36, and its extension shaft is connected to the lead screw drive assembly 341 to control the lifting and lowering of the assembly. The lead screw drive assembly 341 is hinged to the hydraulic device 344 and drives the hydraulic device 344 to swing via the control motor. The hydraulic device 344 is connected to the extraction chuck 343 to drive it to clamp or release. The pressure sensor 345 is located on the top of the shield 36 and connected to the lead screw drive assembly 341 to monitor the required extraction force.

[0053] The lead screw drive assembly 341 is used to raise and lower the pull-out chuck 343, ultimately enabling the lifting and lowering of the slender tube. Through the cooperation of the lead screw and nut, the lead screw drive assembly 341 converts the rotational motion of the second drive motor 342 into the linear motion of the lead screw. The second drive motor 342 provides driving force to the lead screw drive assembly 341. The pull-out chuck 343 is used to clamp the slender tube, and the angle of the pull-out chuck 343 can be adjusted by controlling the motor to adjust the angle of the slender tube, allowing it to be placed into the temporary storage container 4. The hydraulic device 344 is used to control the action of the pull-out chuck 343, i.e., to control the clamping and releasing of the pull-out chuck 343. The pressure sensor 345 is used to detect the pulling force of the lead screw drive assembly 341 on the slender tube; the pulling force refers to the pulling force required to lift the slender tube. The control motor is located inside the lead screw and is not shown in the figure. The lead screw drive assembly 341 is prior art and will not be described in detail here.

[0054] Understandably, in some other embodiments, the extraction device 34 also includes a first operating handwheel 346, which is connected to the lead screw drive assembly 341 and provides driving force to the lead screw drive assembly 341. The first operating handwheel 346 can be used for emergency operation, whereby manual intervention can be performed to complete the relevant actions when the second drive motor 342 experiences an electrical fault.

[0055] like Figure 9 As shown, in some embodiments, the shearing device 35 includes a third drive motor 351, a rotating shaft 352, a hydraulic system 353, and a shearing head 354. The third drive motor 351 is fixedly installed on the top of the shield 36. The extension shaft of the third drive motor 351 is connected to the rotating shaft 352 to drive the rotating shaft 352 to rotate. The hydraulic system 353 is fixedly installed on the shield 36 and extends through the shield 36 into the interior of the shield 36 to connect with the shearing head 354 to drive the shearing head 354 to move.

[0056] The third drive motor 351 drives the rotating shaft 352 to rotate, thereby rotating the shearing head 354 to avoid slender tubes or the extraction chuck 343. The third drive motor 351 can be indirectly connected to the rotating shaft 352 via a gearbox 355, which drives the rotating shaft 352 to rotate. The third drive motor 351 is fixedly mounted on the top of the shield 36. Alternatively, the third drive motor 351 can be directly connected to the rotating shaft 352, with its drive shaft directly driving the shaft to rotate. The hydraulic system 353 may include hydraulic lines, a hydraulic tank (containing hydraulic medium and a pneumatic-hydraulic booster cylinder), and solenoid valves. The hydraulic lines can be located on the rotating shaft 352. By controlling the pressure of the medium supplied by the pneumatic-hydraulic booster cylinder through the solenoid valves, the end effector can be driven to perform clamping or releasing operations, i.e., the shearing head 354 can be driven to perform clamping or releasing operations. The shearing head 354 includes two shearing blades for clamping and shearing slender tubes. The gearbox 355 and the hydraulic system 353 are existing technologies and will not be described in detail here.

[0057] Understandably, in some other embodiments, the shearing device 35 also includes a second operating handwheel 356, which is connected to the rotating shaft 352 via a gearbox 355. The rotating shaft 352 can be manually rotated to drive the shearing head 354 to rotate, avoiding slender tubes or the extraction chuck 343. The second operating handwheel 356 can be used for emergency operation; when the third drive motor 351 experiences an electrical fault, manual intervention can be performed to complete the relevant actions.

[0058] like Figure 10 As shown, in some embodiments, the temporary storage container 4 includes a container body 41 and a hook 42. The container body 41 is located at the lower part of the shield 36 and can be detachably suspended on the hook 42 for easy transfer of the slender tube. The hook 42 is positioned and installed on the shield 36 by a positioning mounting pin 37 provided at the top of the shield 36.

[0059] like Figure 1 As shown, in some embodiments, the nuclear power plant slender tube recovery and processing device further includes a cantilever crane 5 and a rotating base 6. The cantilever crane 5 is rotatably connected to the mobile body 1 via the rotating base 6. The cantilever crane 5 consists of a column, a telescopic arm, a hydraulic cylinder, a chassis, and other structures. The cantilever crane 5 is mounted on the mobile body 1 and can rotate 360° with the help of the rotating base 6. The hydraulic cylinder can raise or lower the telescopic arm, which can be extended and retracted according to on-site operation requirements for emergency maintenance or lifting auxiliary tools, especially for lifting the container body 41 of the temporary storage container 4 and transferring slender tubes. The rotating base 6 and the cantilever crane 5 are prior art and will not be described in detail here.

[0060] like Figure 11The diagram illustrates one embodiment of the invention, where the mounting frame 2, shearing and shrinking device 3, and temporary storage container 4 are placed above the nuclear fuel assembly, and the moving main body 1 is mounted on the refueling machine track. Several detector assemblies are interspersed within the nuclear fuel assembly. The nuclear power plant slender tube recovery and processing device of the present invention is used to extract, cut, collect, and remove the detector assemblies from the nuclear reactor, thus completing the detector assembly removal operation. The operation flow for removing detector assemblies using the nuclear power plant slender tube recovery and processing device of the present invention is as follows:

[0061] First, the shearing and shrinking device 3 is moved above the detector assembly. The moving main body 1 can move on the ground via the drive module 11, driving the entire nuclear power plant's slender tube recovery and processing device to move back and forth. The mounting frame 2 can move along the main beam 12 of the moving main body 1 via the gear assembly 22 and the rack 132, that is, the mounting frame 2 drives the shearing and shrinking device 3 and the temporary storage container 4 to move left and right. The mounting frame 2 can also drive the shearing and shrinking device 3 and the temporary storage container 4 to rotate via the rotation module 24, adjusting the specific position of the shearing and shrinking device 3 and the temporary storage container 4 in all directions, so that the shearing and shrinking device 3 accurately reaches above the detector assembly.

[0062] Next, the detector assembly is extracted using the extraction device 34. The second drive motor 342 is driven, causing the lead screw of the lead screw transmission assembly 341 and the extraction chuck 343 to descend. When the extraction chuck 343 reaches the end position of the detector assembly, the hydraulic device 344 is activated to drive the extraction chuck 343 to clamp the end of the detector assembly. The second drive motor 342 is then driven again, causing the lead screw of the lead screw transmission assembly 341 and the extraction chuck 343 to rise to a certain height and then stop. Then, the detector assembly is cut using the shearing device 35. The shearing head 354 is controlled by the hydraulic system 353 to cut the detector assembly. After cutting, the upper part of the detector assembly is clamped by the extraction chuck 343, and the lower part is fixed by an external stop. The external stop is existing technology and will not be described in detail here.

[0063] Finally, the cut detector assembly is placed inside the temporary storage container 4. The control motor of the extraction device 34 drives the hydraulic device 344 to swing, which in turn drives the extraction chuck 343 to swing, adjusting the angle of the extraction chuck 343, i.e., the angle of the detector assembly. After adjusting to a suitable angle for placement in the temporary storage container 4, the extraction device 34 is operated to place the detector assembly into the temporary storage container 4. The collection of the lower part of the cut detector assembly is handled by repeating the above operation, which will not be elaborated here.

[0064] By implementing this invention, the following beneficial effects are achieved:

[0065] The nuclear power plant slender tube recycling and processing device of the present invention uses a moving main body 1 and / or mounting frame 2 to drive a shearing and shrinking device 3 to the location of the slender tube. The shearing and shrinking device 3 cuts the slender tube into segments to reduce the overall length of each segment. The slender tube is then collected by a temporary storage container 4. This device can effectively process batches of slender tubes that need to be replaced during nuclear power plant overhauls, thereby improving the efficiency of nuclear power plant overhauls.

[0066] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention. These all fall within the protection scope of the present invention. That is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A nuclear power plant elongated tube recovery processing apparatus, characterized by, The application relates to a shearing and shrinking device for elongated pipes, which comprises a moving body (1), a mounting frame (2), at least one shearing and shrinking device (3) and a temporary storage container (4) corresponding to the number of the shearing and shrinking devices (3). The moving body (1) and / or the mounting frame (2) drive the shearing and shrinking device (3) to move to the position of the elongated pipe, and the shearing and shrinking device (3) pulls out the elongated pipe, shears the elongated pipe and then puts the pipe segment into the temporary storage container (4).

2. The nuclear power plant elongated tube recovery treatment apparatus according to claim 1, characterized by, The shearing and shrinking device (3) comprises a driving device (31), a first sliding part (32), a second sliding part (33), a pulling device (34) for pulling out the elongated pipe, a shearing device (35) for shearing the elongated pipe and a shielding body (36) for shielding the radiation of the elongated pipe, the driving device (31) and the first sliding part (32) are connected with the mounting frame (2) respectively, the extension shaft of the driving device (31) is connected with the second sliding part (33), the shielding body (36) is connected with the second sliding part (33), and the pulling device (34) and the shearing device (35) are connected with the shielding body (36) respectively and partially extend into the shielding body (36). The temporary storage container (4) is arranged at the bottom of the shielding body (36) and is detachably connected with the shielding body (36) through a connecting structure to accommodate the pipe segment of the sheared elongated pipe.

3. The nuclear power plant elongated tube recovery processing apparatus according to claim 2, characterized by, The pulling device (34) comprises a lead screw transmission assembly (341), a second driving motor (342), a pulling chuck (343), a hydraulic device (344), a pressure sensor (345) and a control motor, the second driving motor (342) is fixedly installed at the top of the shielding body (36), the extension shaft of the second driving motor (342) is connected with the lead screw transmission assembly (341) to control the lifting of the lead screw transmission assembly (341), the lead screw transmission assembly (341) is hinged with the hydraulic device (344) and drives the hydraulic device (344) to swing through the control motor, the hydraulic device (344) is connected with the pulling chuck (343) to drive the pulling chuck (343) to clamp or loosen, and the pressure sensor (345) is arranged at the top of the shielding body (36) and is connected with the lead screw transmission assembly (341) to monitor the required pulling force.

4. The nuclear power plant elongated tube recovery processing apparatus according to claim 2, characterized by, The shearing device (35) comprises a third driving motor (351), a rotating shaft (352), a hydraulic system (353) and a shearing head (354), the third driving motor (351) is fixedly installed on the top of the shielding body (36), the extending shaft of the third driving motor (351) is connected with the rotating shaft (352) to drive the rotating shaft (352) to rotate, the hydraulic system (353) is fixedly installed on the shielding body (36) and penetrates the shielding body (36) to extend into the inside of the shielding body (36) and is connected with the shearing head (354) to drive the shearing head (354) to act.

5. The nuclear power plant elongated tube recovery processing apparatus according to claim 1, characterized by, The moving body (1) comprises at least two driving modules (11), a main beam (12) and an auxiliary support frame (13), two driving modules (11) are connected to the two ends of the main beam (12) to drive the main beam (12) to move, and the auxiliary support frame (13) is arranged on the main beam (12) in the length direction and is slidably connected with the mounting frame (2).

6. The nuclear power plant elongated tube recovery processing apparatus according to claim 5, characterized by, The driving module (11) comprises a first driving motor (111), a driving wheel (112) and a driven wheel (113), the extending shaft of the first driving motor (111) is connected with the driving wheel (112), and the driven wheel (113) is connected with the driving wheel (112) through a connecting shaft.

7. The nuclear power plant elongated tube recovery processing apparatus according to claim 5, characterized by, The moving body (1) further comprises a walking staircase (14), and the walking staircase (14) is connected with the main beam (12).

8. The nuclear power plant elongated tube recovery processing apparatus according to claim 5, characterized by, The auxiliary support frame (13) comprises a support beam (131) arranged on both sides of the main beam (12) in the width direction and a rack (132) arranged on any side of the main beam (12) in the width direction. The mounting frame (2) comprises a connecting seat (21), a gear assembly (22), a main mounting seat (23) and a rotating module (24), the gear assembly (22) is fixedly installed on the connecting seat (21), the connecting seat (21) is slidably connected with the support beam (131) and is connected with the rack (132) through the gear assembly (22), and the main mounting seat (23) is rotatably connected with the connecting seat (21) through the rotating module (24).

9. The nuclear power plant elongated tube recovery processing apparatus according to claim 8, characterized by, The gear assembly (22) comprises a transmission gear (221) and a fourth driving motor (222), the fourth driving motor (222) is fixedly installed on the main mounting seat (23), and the driving shaft of the fourth driving motor (222) is connected with the transmission gear (221).

10. The nuclear power plant elongated tube recovery processing apparatus according to any one of claims 1 to 9, characterized by, Further comprising a cantilever crane (5) and a rotating base (6), the cantilever crane (5) is rotatably connected with the moving body (1) through the rotating base (6).

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